The law of conservation of energy states that energy cannot be:
a) Created or destroyed
b) Increased or decreased
c) Transferred
d) Converted to mass
Which of the following is an example of potential energy?
a) A moving car
b) A stretched spring
c) A rolling ball
d) A flowing river
In a closed system, the total mechanical energy is:
a) Constant
b) Increasing
c) Decreasing
d) Zero
Kinetic energy is directly proportional to:
a) The square of the velocity
b) The mass of the object
c) The square of the mass
d) The distance traveled
The work-energy theorem relates the work done to the:
a) Change in velocity
b) Change in acceleration
c) Change in energy
d) Change in force
The principle of conservation of mechanical energy holds true when:
a) There are no frictional forces
b) There are no external forces acting on the system
c) The system is at rest
d) Both a and b
Which type of energy is stored in an object due to its position or condition?
a) Kinetic energy
b) Thermal energy
c) Potential energy
d) Chemical energy
The work done by a force is equal to the change in:
a) Speed
b) Momentum
c) Kinetic energy
d) Force
If the total energy in a system is constant, it means that:
a) Energy is being created
b) Energy is being destroyed
c) Energy is being transformed from one form to another
d) Energy is not moving
Which of the following is true when an object is at its highest point in projectile motion?
a) Its kinetic energy is at maximum
b) Its potential energy is at maximum
c) Its total mechanical energy is zero
d) Its speed is constant
Which form of energy is involved when a battery is charging?
a) Kinetic energy
b) Electrical energy
c) Chemical energy
d) Nuclear energy
When a car brakes to stop, its kinetic energy is converted into:
a) Potential energy
b) Heat energy
c) Sound energy
d) Both b and c
The unit of energy in the International System of Units (SI) is:
a) Kilogram
b) Joule
c) Watt
d) Newton
The total mechanical energy of an object is the sum of its:
a) Kinetic and potential energy
b) Gravitational and elastic energy
c) Speed and velocity
d) Work and power
In an isolated system, the total energy before and after an event:
a) Changes significantly
b) Is always conserved
c) Depends on the type of energy involved
d) Can be lost to the surroundings
The energy stored in the bonds of molecules is called:
a) Thermal energy
b) Chemical energy
c) Gravitational energy
d) Electrical energy
When a pendulum swings, the potential energy at the highest point is converted to:
a) Kinetic energy
b) Heat energy
c) Gravitational energy
d) Both b and c
A ball thrown upwards gains potential energy as it rises. This energy is transformed from:
a) Chemical energy
b) Kinetic energy
c) Electrical energy
d) Thermal energy
In an elastic collision, the total energy before and after the collision:
a) Increases
b) Decreases
c) Stays constant
d) Varies with velocity
The work done on an object is equal to the:
a) Change in energy of the object
b) Change in momentum of the object
c) Force times distance traveled
d) Mass times acceleration
In a system with no external forces, the total mechanical energy is:
a) Conserved
b) Lost
c) Gained
d) Zero
Which of the following forms of energy is associated with the motion of particles in a substance?
a) Electrical energy
b) Thermal energy
c) Chemical energy
d) Gravitational potential energy
The total energy of a system is the sum of all forms of energy, including:
a) Kinetic and thermal energy
b) Gravitational and kinetic energy
c) Potential and electrical energy
d) All of the above
In the conservation of energy, what happens to the energy that is not used to do work?
a) It is destroyed
b) It is transferred into heat or sound energy
c) It is converted into kinetic energy
d) It is absorbed by the surroundings
In an inelastic collision, energy is:
a) Conserved
b) Lost as heat and sound
c) Increased
d) Transferred to the surroundings
When an object falls freely under the influence of gravity, its potential energy is converted into:
a) Kinetic energy
b) Thermal energy
c) Chemical energy
d) Sound energy
A car travels up a hill, converting kinetic energy into:
a) Sound energy
b) Potential energy
c) Heat energy
d) Electrical energy
The efficiency of a machine is the ratio of:
a) Output energy to input energy
b) Input energy to output energy
c) Work done to energy input
d) Work done to energy output
The energy stored in an object due to its motion is known as:
a) Kinetic energy
b) Gravitational potential energy
c) Elastic potential energy
d) Chemical energy
What is the total mechanical energy of an object at its highest point in free fall?
a) Zero
b) Equal to its potential energy
c) Equal to its kinetic energy
d) The sum of potential and kinetic energy
In the case of a roller coaster, the total mechanical energy at the highest point of the track is:
a) Maximum
b) Minimum
c) Constant
d) Zero
The energy required to lift a weight in a gravitational field is:
a) Kinetic energy
b) Work done
c) Heat energy
d) Potential energy
